# What is the Importance of the Span /depth ratio ?

Dear friends,

You have so far seen many beams in your life. Right?

Why a Beam is not cast with its larger side as horizontal?

Why the larger dimension of the beam is always kept vertical?

You must have asked this question many times.

It shall tell you the exact reasons for doing so.

When selecting a rolled steel I-section for a simply supported beam, along with minimum section… by Santosh Kulkarni https://www.quora.com/When-selecting-a-rolled-steel-I-section-for-a-simply-supported-beam-along-with-minimum-sectional-modulus-a-minimum-value-of-span-to-depth-ratio-is-ensured-why/answer/Santosh-Kulkarni-37?share=4e7688b2&srid=zM5g

# Calculate Cutting Length for Rings… so easy.

Hi dear friends ,

Good afternoon.

A hearty Welcome to the recently joined followers.

We are now a 585 strong construction team .

Just think , together we can undertake and successfully complete any multi crore project.

By the way , ” Your Question bank ” has been released to many followers on request.

Those who have the desire to obtain a copy , kindly refer to this post :

HOW TO USE THE QUESTION BANK ?:

Today you shall understand the theory and practice behind the stirrups.

Stirrups are also called Links or Rings or Transverse Reinforcement.

These are used for Beams and Columns.

In a Beam , the stirrups are vertical and in a column , these are horizontal.

Each ring has a HOOK at one of the corners which keeps the ring in its shape. The ring shall open if this hook is not given.

Look at this chart to understand about the calculations of the hook length :

look at this detail usually given in a RCC drawing :

Now let us solve an example and find out the cutting length for LINKS for a column

Now let us  take another example :

Hope you are getting the whole picture :

Now try your practice with this example.

Now let us take a complete example :

Now , let us see what all we need to find out :

here is the solution :

Now it is the right time to share with you a simple short cut :

In case you would like to have a formula that can be used for any cover , any hook length , this is it :

# BEAM REBARS ? ..WHY WORRY ?

Good evening friends ,

Dear Friends ,

Good evening.

# This is BBS ..dear !

Friends ,

The Structure of a building is in Reinforced Cement Concrete.

The steel bars provided in the concrete make it strong to carry the tensile forces.

Thses bars are called as REINFORCEMENT.

The detailing of these bars [ Diameter ,spacing,covers, laps , dowel lengths, development lengths and shapes } are provided by RCC designer and are specified in the RCC drawing.

The extract of the steel reinforcement in the form of a table is known as Bar bending Schedule. The tabulation of the reinforcement details can be conviniently done using the MS Excel.

Professional contracting firms have got printed formats for BBS ready for the use of their staff. The BBS is prepared by the Qauntity Surveyors during estimation . The BBS is also prepared by the Site Engineers for controlling the quality of the Reinforcement Bars at site. The BBS is also an excellent tool for recording the measurements of the Reinforcement bars at site and the BBS can also be used to submit the Bills for the Reinf..bars.

This is a chart which basically gives the micro details about the various bars. This gives the dia, shape of bar , cutting length of the various bars in a RCC element such as Footing, column , beam ,slab etc.

The site engineer prepares the BBS based on the drawing and after due verification , hands it over to the reinforcement fitter.

By the use of BBS , the weight of the Re-bars can be easily calculated.

Let me explain you this popular tool with an example.

Imagine , there is a beam of the following cross section.

The details of the reinforcement have been tabulated in the following table :

The cutting lengths of each bar is calculated and tabulated as follows :

But you can see that many details are missing from this abstract. Hence , a better tabulation , known as the BBS has been prepared which gives each details of the Re-bar in a crystal clear method :

The bar bending gives a very clear picture of the reinforcement.

# MATERIAL COST …QUITE EASY

Dear Friends ,

In the previous article , we found out the exact quantities of the REBARS in a GROUND BEAM ( P7 ). [ Read this article here ].

Today , we shall find out the total material cost of the same beam.

First of all , just go through this data.

Now , let us find out the material cost .